TS EN 61675-2/A1

TS EN 61675-2/A1 is an amendment to the Part 2 document in the Radionuclide imaging devices - Characteristics and test conditions series, focused on single photon emission computed tomographs. The technical subject is the characterisation of SPECT systems used in nuclear medicine, where image quality depends on the combined behavior of the detector, collimator, data-acquisition chain and reconstruction software. In practical terms, this family of standards helps different devices be described and assessed using the same technical language.

Technical context of single photon emission tomography

SPECT converts the spatial distribution of a radiopharmaceutical into tomographic images. Because the method detects gamma photons emitted by a tracer inside the body, its performance is typically discussed in terms such as spatial resolution, sensitivity, uniformity and count-handling behavior. General technical background matters here: the collimator strongly influences the balance between resolution and efficiency, while reconstruction settings can affect how the final slices represent the measured data. These are well-established principles of the modality, not claims about any specific test clause in this amendment.

What the amendment designation means

As an A1 document, this listing should be understood as a change to the parent standard family rather than a standalone technical specification with its own complete test program. In standards practice, amendments are often used to refine definitions, align terminology or adjust how characteristics are expressed so that equipment comparisons remain consistent across laboratories and manufacturers. For customers working with SPECT equipment, the value lies in a more disciplined framework for describing performance and test conditions.

• Characterisation framework for radionuclide imaging equipment
• Focused on single photon emission computed tomographs
• Supports consistent performance description and comparison
• Amendment status means it complements the parent standard